Land scraper



April 8 i924 G. D. WEAVER LAND SCRAPER Filed SepJt.v l, 1923- Wil.-

5 Sheets-Sheet l April 8 1924.

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, G. D. WEAVER LAND SCRAPER Filed sept. 1, 1923 5 sheets-'sheetllfqlllll lllllllllll l nnen To@ s@ @G7-3W atto/L 140,11

G. D. WEAVER 0 LAND SCRAPER Filed Sept. l, 1923 G. D. WEAVER LANDSCRAPER Shee s-Sheet 5 gnvantoz 6.1). Weaver? Elbmmw Q o o l Y mm @Q JWNw N Nw NN 1 o mw N Q1 l Figure Patented Apr.. 8, i924.

PATENT OFFICE.

GEORGE D. WEAVER, OF MYRTLE CREEK, OREGON.

LAND SCRAPER.

` Application filed Septemberl, 1923. Serial No. 660,614.

To all whom t may concern Be it known that I, GEORGE D. VEAVER, acitizen ofthe United States, residing at Myrtle Creek, in the count-y ofDouglas and State of Oregon, have invented certain new and usefulImprovements in Land Scrapers, of which the following is a specication.

My. invention relates to ground scraping or leveling apparatus.

An important object of the invention is to provide an apparatus of theabove mentioned character, adapte-d particularly for use in building orgrading roadways, while not necessarily restricted to this use.

A further object of the invention is to provide apparatus of the abovementioned character, having means for holding -the scraping element ina, forwardly inclined position, at the starting loading operation, andto permit' of the adual rearward tilt-ing of the scraping eement, as thesame receives: the load, such tilting operation being iutomaticallyeffected by the weight of the oad.

A further object of the invention is to provide' apparatus-of the abovementioned character, so constructed that the scrapingl element willautomatically tilt rearwardly, when loaded beyond a predetermined ca.-pacity, thereby elevating the forward cutting edge of the scrapingelement, for discontinuing the loading action.

A further object of the invention is to provide apparatus of the abovementioned character, having meansl whereby the scraping element may bereleased and dumped, after or before'complete loading, at the will ofthe operator. l l @ther objects and advantages of the invention will beapparent during the course of the. following description.

In the accompanying drawings forming a i part of this specification, andin which like munerals are employed to desiglriatey like partsthroughout the' same,

f Figure lis va plan View of bodying'my invention,

Figure 2 is ya side' elevation of the saine,

apparatus emshowing the parts in the 'starting' loadingv v able means.'

position, v c

3 vis a central longitudinal section taken on line 3 3 of Figure 1,showing the parts in a similar position,

Figure 4 is a similar view taken on line 3 3 of Figure 1, showing theparts shifted to the loaded position,

Figure 5 is a similar view showing the parts shifted to the unloadingposition,

Figure 6 is a side elevation of the guidesupport or housing, showing theassociated elements in the shifted and tripped positions,

Figure 7 is a transverse section taken in line 7-7 of Figure 2,

Figure 8r is a similar view taken on line 8-8 of Figure 2,

Figure 9 is a side elevation of a support element or yoke, and,

Figure 10 is a. detail section through one end of the cro beam,showing\the clampm means therefor.

n the drawings, wherein for the purpose of illustration i's shown apreferred embodiment of `my invention, the numeral 15 designates a.scraping element or pan of any well known or preferred type. Thisscraping element is provided at its ends with runners 16, ri 'dlyattached thereto, as shown at 17 an 18. These runners embody frontvertical portions 19 and, upper approximately horizontal portions 20,asshown.

Extending across the top of th'e scraping element 15 is a horizontalbeam or support 21, which is mounted upon the horizontal portions 2Ov ofthe runners. I-iprefer to proy vide the beam 21 with L-sha edclampingbolts 22, Fi re 10, adapte toengage beneath the horizontal port-ions20,. and to fit within selected notches 23, as shown.

Arranged in advance of the scrapin element 15 and longitudinally of theirection of draft, is a slightly. inclined supportguide or housing 24,preferably formed of a section of strap iron, bent yupon itselfprovidinga. rear end 25,'connecting the sides.

of the support-guide. The' forward end of this support-guide ispreferably open, and

`a transverse plate 26 is arranged between the ende-Tof thej sides ofthis support-guide, near and` s aced from..the forward ends thereorigily attached thereto by any suit- E Mounted to slide withinthesupport-guide or housin ,24,"with lrelat'on theretdis a drawbar 2slidable w'ithin'epenings 28 and 29, formed in the plates 25 and 26respec tively. A roller 30 1s carried within the rear end of thesupport-guide, above the drawbar 27, and a roller 31 1s carried in theforward end of the .support-guide, preferably in advance of the plate26, and engagesabove the drawbar 27, as shown. A suitably stiff coilspring y32, surrounds thedrawbar 27, within the support-guide orhousing,.and its rear end engages the stop element or plate 33, heldagainst rearward movement with respect to the drawbar, by means of atransverse pin 34, carried by the drawbar. The forward end of the springengages against the transverse plate 26.

Connected with the forward end of the drawbar 27, in advance of thesupport-guide or housing, are rearwardly diverging 'support bars 35,rigidly attached theretol by means of a bolt 36 or the like. Thesesupport bars diverge rearwardly, as stated, and are provided at theirrear ends with eXtensions 37, which are preferably parallel and carryheads 38, having elongated slots 39. These slots receive therein angedrollers 40, 'pivotally supported by L-shaped brackets 41, which arerigidly attached to the forward edge of the transverse support bar 21. D

The rear end of the drawbar 27 is suspended from the transverse supportyoke 42, see particularly Figures 5 and 9. The horizontal portion ofthis support yoke is clamped to the rear end of the drawbar 27 by meansof a U-bolt 43. The yoke 42 is suspended from the support bars 35, bymeans of U-bolts 44, carried thereby, and fitting in selected notches45, as shown.

The numeral 46 designates lower connecting bars, which divergerearwardly. These connecting bars are preferably formed longitudinallyadjustable, and for this pur ose each bar may embody bar sections 47 an48. The bar section 47 is slidable within a sleeve 49, formed upon therear end of the bar section 48, and the bar sections may be clampedtogether at a selected longitudinal adjusted position ,by means of abolt 50, as shown. The rear ends of the lower sections 47 are pivotallyconnected with the forward ends of the sides of the scraping element, atpoints near and spaced from the bottom of the scraping element, as shownat 51.l The forward ends of the bar sections 48 are rigidly secured to acarriage 52,'embodyin`g inverted L-'shaped members 53. Each `invertedl..-v shaped member lis preferably ri idly attached to the forward endof the gar member 48. The inverted Lshaped members 53 have theirhorizontalportions rigidly connected at points near their rear lends bymeans of a transverse shouldered bolt 54, and these members carry anupper roller 55, suitably disposed between the same, and ro` tatablyconnected therewith. The roller- 551` travels upon the top of thesupport-guide 24,

as shown. The lower ends of the inverted L-shaped members 53 are rigidlyconnected by means of a shoulder bolt 56, as shown.

In order that the carriage 52 may be held against longitudinal movementupon the support-guide 24, until it is desired to dump the load, suchcarriage is equipped with a locking bail or element 57, pivotallyconnected with the inverted L-shaped members 53, as indicated at 58. Thebail 57 is urged upwardly by retractile coil springs 60, attaehedthereto, and to the forward ends of the horizontal arms of the members53, as shown. This bail is adapted to engage over the forward edge of atrip element 61, arrangcd'between the forward ends of the sides of thesupport-guide 24, and pivoted thereto for swinging in a vertical plane,as indicated at 62. The pivot 62 is located at the extreme lower end ofthe trip element 61, and the bail e 57 engages, in the locked position,with this trip element, above the pivot 62. The trip element 61 carriesa pin or bolt 63, at its upper end, engaging with a retractile coilspring 64, which serves to normally retain the trip element in the rearposition, and to return the same to this position, when released. Thetrip element 62 is equipped with a roller 65, adapted to be engaged by atrip lever 66, which may be moved by a line, not shown. f

The numeral 68 designates an upper operating link or element, extendinglongitudinally above the support-guide or housing 24. This connectinglink or element preferably embodies a pair of spaced bars 69, rigid- -lyconnected by shoulder bolts 70. The forward endsl of the bars 69 arepreferably curved downwardly, as indicated at 71, and these curved endsare pivotally connected with the forward end of the guide-support orhousing 24 by means of a shouldered bolt 72, and this bolt also carriesthe roller 31. The curved ends 71 are located within the 'support-guide,while the trip lever 66 is lois also pivotally supported by the bolt72.V The operating connecting element or link` 68, extends rearwardly,and is pivotalliy connected, at 73, with an upstanding` lever 74, thelower end of which is preferablyv forked, and is pivotally connected, at7 5, with the rear end of the drawbar 27. The upper end of the lever 74is pivotally connected, as shown at 76, with a hand lever 77. This handlever is pivotally connected at its lower end, as shown at 78, rwitha`rigidlink or bar 79, which is preferably longitudinally adjustable.This link or bar extendsrearwardly and has pivotal connection with thetransverse beam '21," at. -a point equidistantly` spaced from the'endsthereof, as shown at 80. The rigid bar or link 7 9 has a. toothedquadrant 81, ri idly mounted thereon, for cof scraping element 15, isnow inclined downwardly in a Aforwardly direction, whereby it will diginto the ground for a suitable distance, and the scraping operation ishad, with the gradual filling of the scraping-element.

' As the scraping element approaches the loadedcondition, its weight'.increases, and the pull forwardly uponthedrawfbar 27 is opposed, bytheApull rearwardly on the scraplng element, due to the increased load.These opposing forces` will` .now lcompress the spring, with. the resultthat the supportguide or housing 24 moves rearwardly upon x f the draftbar 27. Upon this rearward movement, the operating connecting link orbar .30. l i j its upper end swung rearwardly. This .moves the rlgid baror 'link 79 rearwardly, `and the"supportfguide` or housing 24, withrespect tothe drawfbar, 'as above explained, the lower,4 connectingbars'g`46 move rearwardly and theoperating .conneetinglink or element i50, ,gniofvesgrearvmrdly. v However, thel link 68 v ficiently, before` treached, whereby the forward connecting edgeof the scraping element iselevated `suf-:j` `ficientf,ly,s`o that `it will nottake ,further load I68 moves rearwardly, with respect 'to the' draftbar 27, andthe operatinglever 74 has hence the upper end fof thescra'per is swung rearwardly,and the lentire scraping element iis tilted rearwardly. This tiltingaction rear wardly,` gradually `progresses assthe load within thescraping element increases, until the'point is approached at which thescrap ing element'would be overloaded. However,`

action has occurred sufe` the rearward tiltin he overloading point" isor tltQ` f f Upon the rearward movement 1 of operates theleve 11"74`andelements connected f therewith, whiehwill injturn move-the lpperyportion of the scraping elementrearwf nly@ a greater distance-than theAlower ,ha' '1 "s 'are` moving the `lower-. ortion of the 'samerearwardly.' resu `tsli'n the rearward tilting of the scraping element,las is obvious. v'In l -other-words, there is a differential action be-vtween the means-which connects thel lowerv vportion of'thes'crapingelement with the,

sppport-guide andthe means which confifect's the upper .portlon oflthescraping ele- Iment with the support-guide, and it is by,

virtue vof this di erential action, that the scraping.` element istilted rearwardly, upon ment. v Y

5. In a scrapingfappaiatusof the chan' the rearward movement of thesupport-guide or housing. Vith` the scraping element thus properlyloaded, the same may be dumped by pulling upon the line 67, which willswing the trlp element 61 forwardly whereby the bail 57 moves downwardlyoff' of the then inclined trip element."V Further pull upon the draftbar 27 will throw ory roll the scrap:

ing element forwardly, to the dumping position, as clearly illustratedinFigure 5.

It is to be understood that the form ofmy invention herewith shown anddescribed isto be taken' as a referred example of the same, and thatvarious changes in the shape, size, and arrangement ofparts, may beresorted to withoutdeparting from, the spirit of my invention, or thescope of the subjoined claims.

- Having thus described my invention, what l1. In a scraping apparatusof the character described, a scraping element, a drawbar, ak yieldingelement carried by the' drawbar, and differential means connecting theyielding 'element with the upper and lowerportions ofthe scrapingelement whereby the scraping element may tilt rearwardly upontheincreaseof the load therein.

2." In ascraping apparatus of the character described,r azfscrapingelement, a draft element, lyielding,means connected with the draftelement, and differential means connecting'the'yielding element with thescrap i ing element at spaced points for effecting thetilting of thescraping element in one direction as the loadvthereln increases.

3. In a scraping apparatus of the characterv described, a scrapinelement, a draft bar arranged in advance o the same, a mem'- ber mountedupon the draft -bar to move longitudinally thereof, yielding' means tooppose-` the rearward movement of. the memberuponthedraft bar, means'-connecting the/member with the lower portion ofthe scraping element, apivoted lever, means connecting the pivoted lever withsaid meins4 andmeans connecting the pivo'tedv lever with the upper portion j of. thescrapinglelel ber v ment.l n

. '41# vIll a scraping' apparatus. Lofthe' char,-

loo

acter described, a @raping element a bararranged in advance of the same'a mehr@ berv mounted" v upon the draft barf, tof move longitudinally;thereof; yielding n'finto] oppas@ therearward mwament 0f the. memff 1ber upon theV draft k' bar,incluis. connecting the member with the lowerportion of the. Y

scraping element, alever pivoted to the rear porti'on of the draft bar,a connecting ele ment 'pivoted tothe lever. between its ends and pivotedt sadmember, and means connectin the opposite end portion of the leverwith t e upper portionof thescraping ele-y acter described, a scrapingelement, a draft bar arranged in advance 'of the same, a support-guideslidable longitudinally upon the draft. bar, yielding means to opposethe rearward movement of the support guide upon the draft bar, acarriage movable longitudinally upon the support-guide, releasable meansfor locking the carriage upon the support-guide against rearward longitudinal movement, connecting means between the carriage and the lowerportion of the scraping element, an upstanding lever pivoted at itslower end to the rear portion of the drawbar, a link connected with theintermediate portion of the lever and connected with the support-guide,and means connecting the upper portion of the lever with the upperportion of the scraping element.

6. In a scraping apparatus lof the character described, a scrapingelement, a transverse support connected with the upper por-Y tion of thesame, a drawbar arranged in ad-Y vance of the scraping element, aguide-support slidable upon the drawbar, a spring to oppose the rearwardmovement of the guidesupport upon the drawbar, a carriage slidable uponthe guide-support, releasable means to prevent the longitudinal movementof the carriage upon the guide-support, means connecting the carriageand the lower portion of the scraping element, supporting bars attachedto the forward end of the drawbar and extendingA rearwardly and having aslidable connection with the transverse support, means supporting therear end of the drawbar from the supporting bars, an upstanding leverpivoted upon the rear portion of the drawbar, a link pivoted to theintermediate portion of the lever and pivoted to the guide-support, andmeans connecting the upper portion of the lever with the transversesupport.

7. In a scraping apparatus of the character described, a scrapingelement having runners arranged in advance of the same, a transversebeam mounted upon the upper portion of the runners, a drawbar in advanceof the scraping element, a housing slidable upon the drawbar, a springupon the drawbar within the housing to oppose the rearward movement ofthe housing upon the drawbar, a carriage movable longitudinally upon thehousing, a latch to connect the carriage with the forward end of thehousing, means to trip the latch, means vconnecting the carriage withthe lower portion of the scraping element, supporting means suspendedfrom the transverse beam and connected with the rear portion of thedrawbarfand the forward portion of the drawbar, a pivoted lever, meansconnecting the lever with the housing, and means connecting the leverwith the transverse beam.

In testimony whereof I a-fiix my signature.

GEORGE D. WEAVER.

